SO FOURTH FLOOR, SOUTHEAST WING 
A curious and remarkable instance of parallel evolution is furnished by 
GiraffeCamel the cases of the giraffe camel and the giraffe. The former 
and Giraffe was descended from the primitive camel which lived in North 
Giant Pigs -\merica, while the giraffe had for its ancestor the primitive 
and Pygmy antelope of the Old World; thus each species evolved inde- 
Hippopot- = pendently of the other. The giant pigs, or elotheres and the 
emus pygmy hippopotamus will repay examination. 
The primitive rhinoceros-like animals are shown near the center of the 
hall on the right. It seems hard to believe that our vast western country 
and indeed all North America, was once the home of the 
Rhinoceros 
- 
fields in the Tertiary Period and their fossil remains are found imbedded in 
rhinoceros. As here indicated vast herds roamed over the 
the Plains of South Dakota. Opposite these are shown the ancestors of 
the dogs, cats and other carnivores, among which is the giant saber-toothed 
tiger. 
On the south side on the right are skeletons of titanotheres, on the left 
of uintatheres, huge extinct, horned animals peculiar to North America. 
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mez x , ai age 
, — . _ 00 ~“ 



Restoration of Brontosaurus. One of the largest of the amphibious dinosaurs, cold- 
blooded, slow-moving, unintelligent creatures that grew to large size (65 ft. in length) in 
the rich vegetation of the Reptilian era 
